5471161781 has 2 divisors, whose sum is σ = 5471161782. Its totient is φ = 5471161780.

The previous prime is 5471161747. The next prime is 5471161783. The reversal of 5471161781 is 1871611745.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4783935556 + 687226225 = 69166^2 + 26215^2 .

It is a cyclic number.

It is not a de Polignac number, because 5471161781 - 2²⁶ = 5404052917 is a prime.

It is a super-2 number, since 2×5471161781² = 59867222467750183922, which contains 22 as substring.

Together with 5471161783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5471161783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2735580890 + 2735580891.

It is an arithmetic number, because the mean of its divisors is an integer number (2735580891).

Almost surely, 2^5471161781 is an apocalyptic number.

It is an amenable number.

5471161781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5471161781 is an equidigital number, since it uses as much as digits as its factorization.

5471161781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 41.

The square root of 5471161781 is about 73967.3021070797. The cubic root of 5471161781 is about 1762.0836398656.

The spelling of 5471161781 in words is "five billion, four hundred seventy-one million, one hundred sixty-one thousand, seven hundred eighty-one".